Tom Coughlin is coaching with a heavy heart today as he continues to mourn the loss of his brother, John, who died suddenly on Monday at Hackensack Medical Center.

John Coughlin, 63, was born in Waterloo, N.Y. but has lived in New Jersey for the past 20 years. He was a horse trainer, owning and operating Coughlin’s Stables at the Meadowlands Racetrack, located just a few yards from the Quest Diagnostic Performance Center.

“Our family is thankful for the expressions of sympathy and prayers for our brother John’s passing,” Coughlin said in a statement. “We appreciate them. John was a friend to all. He loved life and will be greatly missed. He left us way too soon.”

John Coughlin, nicknamed "Sliver," was coach Coughlin’s only brother. He has five sisters.